In the case of a normally closed type of conventional solenoid valve, continuous energization is required to maintain open state. The latching solenoid valve doesn't require a power supply for the purpose of maintaining open state through the utilization of a permanent magnet. Please see here for an explanation of the principles of operation.Operation principles of the latching mechanism.

【Merits of the Latching Solenoid Valve】

1. Eco-friendly and energy efficient.

A latching solenoid valve does not require energization to maintain its state, so for applications where a conventional valve would require long periods of energization the economical benefits are significant.

2. Low heat generation limiting thermal influence on surroundings.As energization is not required to maintain the state, the heat generation associated with energization is reduced. Suitable for analytical fields and other applications where the effect of temperature on a fluid is a concern. The "EL Series" pinch valve is an example of one product that uses this mechanism. Other latching solenoid pinch valves and diaphragm valves are also available.

3. Compact and powerfulA large current is necessary to create a large force from a solenoid, however to prevent a burnout it is usually necessary to make a larger size of solenoid (i.e.a larger electrical capacitance), or to limit the energization to short periods of time.

However as the heat generation in a latching solenoid is suppressed, large power outputs can be achieved without restraints on energization time or the size of the solenoid.

This contributes to compact sizing and a high-pressure rating, and also allows for a continuous duty cycle.